Some 2015 Transit vehicles equipped with a 3.2L Duratorq-TDCi engine built on or after 06-Mar-2015 may set diagnostic trouble code (DTC) P2539 during a KOEO self-test. This DTC sets when the powertrain control module (PCM) does not detect a change in the fuel delivery pressure switch after engine shutdown. If DTC P2539 is not present after performing a key on engine running (KOER) self-test, there is no illuminated malfunction indicator lamp (MIL) while the engine is running, no drivability concerns, and no other DTCs, then P2539 should be ignored. No further service action is required.
